Concrete-pipe form.



H. E. BURNS.

CONCRETE PIPE FORM;

APPLICATION FILED MAR. 30. 1911.

Patented Dec. 31, 1918.

L mas V r mggs "I: "nu "up: w, rnmunun wasnmnlau. u.

a citizen of the United States, residing at Chicagmin the county of CookandState w S A EN OFFICE; T

CHICAGO, ILLINOIS, A conronn'r oiv or ILLInoIs. v

Toall'whotn it may concern..-

IBG it known thatI, HOWARD EL BURNS,

of Illinois, have invented a certain new and useful 1 Improvement inConcrete- Pipe Forms, of which the following 1s a full, clear, concise,and exact description, reference being'had to the accompanying draw:ings, forming a part of this SPGCIfiCatIOH -My invention relates toconcrete pipe forms and has for its object the provision 1 of a pipeform consisting of anoutsideform and acore, together withinstrumentalities for collapsing the core to P81111113, removal thereoffromthe finished concrete pipe and for changing the shape and sizeoftheform 'within certain .limitsto enablethe construction of concretepipes of different sizes and shapes.

The device'of my invention consists generallyof an outside form composedof two main sections, each onesemi-circular I in shapearranged to bebolted,*or otherwise secured, togetherto form a circular form for theoutside of a concrete pipe. The inside form isconstructed so that it maybe collapsedto permit its removal after the concrete has set. Toenlarge, the inner and outer-form I provide fillers which are in--serted between the two semi-circular sec tions of the outer form.Inserts are also.

provided for the inner form so that it may also be enlarged tocorrespond with the outer form. These and other features of my nventionwill be pointed out with greater "clearness in connection with theaccompanying drawings whereln,

Figure 1 Is an end elevational view of the form of my invention, theformbeing ar ranged'to cast acircular pipe;

view taken'along the line 3-3 of Fig 2' Fig.2 s a view similar to 1showing the form enlarged to" cast a pipe f larger cross sectional areathan the pipe cast by Fig.1;

Fig. 3 is a horizontal cross sectional looking in the directionindicated by the arrows;

Fig. 4 is a fragmentary perspectlve view of a pipe produced by the formshown In Fig.2 and Specification of Letters Patent.

,"coNonETn-I'IP 'ronnt.

similar partsthroughout the several views.

. HOWARD nfnunivs, or CHICAGO, IL InoIs, ASSIGNOR To 0. I. MASSEYCOMPANY, on.

' Patented Dec. 31, 1918. I Application filed March 30, 1917. Serial No.158,601. I

Fig. 5 is a fragmentary perspective 3 Referring first to Fig. 1,Gdesignates the outside form and .7 the inside form. The

concrete pipeis formed in the space indi v cated at 8 between the innerand outer forms.

The outer form 6 consists of two sections 9 and 10, each, sectioncomprising a metallic plate 11 havingreinforceing channel irons 12attached thereto. The section 9 is provided along one of its edges withan angle iron 13 and alongits opposite edge with an angle iron 14. Theseangle irons are at. tached .to'thefmetallic plate ll by rivets, or

anysuitable means. I The base plate 11 ofthe section. 10 carries alongone of its'edges an angle iron 16 and along its opposite edge anangleiron 17, the angle irons being attached to the base plate 11 in anysuitable manner. The angle irons 113 and 16 are provided with aperturesarranged to register with each otherand through which several bolts 18are arranged to extend. The angle irons 14 and 17 are providedwithsimilar registering apertures through which the bolts 19 are permittedto extend.

;Therin'ner form7 consists of two plates 20 and 21, the plate 21 beingprovided along one of its edges with an angle iron 22', and the plate 20withan vangleiron23. These angle ironsare provided with registeringapertures through which bolts 24: 24 ex tend. Pivotally attached to eachone'ofthe bolts24c,as most clearly shown in Fig; 3, is a plurality ofarms 25.25, the inner end of eachv arm being pivotally attached at 26 toa T bar shown at 27. This 'Tbar is rigidly attached to a channel 28 oneside of which is 'pivotally connected at 29 to the arms shown at 30. Theouter end ofeach one of the arms 30 is providedwith the two boltsshownat 3131 which are arranged to register with. two of three aperturesprovided in the cooperating arm 32, there being one arm 32 employed foreach arm 30. When the form is used for casting a pipe having asubstantially circular cross section the arms 32 and '30 assumetheposition illustrated inFig. 1 and are held in this position 'by thebolts shown at 3333 which extend rigidly carried bythe plate 120.similar pivotal connection is provided between the channel iron 28 andthe angleiron 36 rigidly carried by the plate 21. I

angle iron 23 carriesa plurality of angleirons and the plate 21.isfprovided with-{- 7 similar angle irons, as shownat38. Interj posedbetween the edges of the plates 20land 21 is a filler 39"which' is; held'in plac'efby suitable angle irons 4:0 bolted to the angleironsv3 7; and38; The filler 3ecom rises the 'two strips'tl and 42, the former ofwhich extends between the edges oi the plates 20 it I and 21, and thela'tter extends between-the and 38, as1nost clearly shown:

angleTironsg37 in Fig. 1;

In removing the outer form the-bolts and 19 are removed." To remove theinner, form it is necessary to' oollapsethe same and this .is vaccomplished by detaching the fillep 39v from the angle irons '37 and '38; orby detaching'the filler'39f1'onrtl1e irons 38 andi; swinging the fillerinwardly about the bolts connecting it WiththeironsST. The filleristhenremoved and the T bar 27 moved I from the positionishown in fulllines in Fig. I 3 to the position shown in dotted lines; This" movementresultsg in movement of the arms- 1 25-+25 about their pivotjpoints 21-24 and anainward pull iongthe" free ends of the sec tiOns ZOaand 21;This/inward pull'on the free ends-of the" sections 20. and 2lnservestocontract the sections'sothat the entire inner f rm-maybe, removed; V

In the; casting of a concrete pipe which has a substantially elliptical:or. oval shape the: novel arrangement of inserts. shown in Fig. 2, isve'mployedr, iTo enlarge-the outer form (ithe two inserts 43 and44Jareput in place between the edges of the sectionsi9 and? 1 0.7Eachiinsertflfconsists of alchannel' iron 451towhich-eis rigidlyattached'a T bar 46V 1 provided 7 with apertures which register with:the apertures provided in other adjacent angle irons Ls'oythatv thebolts 47"47J may .be

utilized to ,hold the two sections, together with inserts, in place. To"enlarge the inner form v7 the sections are separated by freinov-,

ing, the bolts 24 and the, insert48} interposed f between the angleirons 23 and 22. This'in sert consistsnof achanne1-ironi49'and a bar 50rigidly attached to the channel iron. The T bar containsapertnres whichregister with the boltaperturesin the angle irons and 22. vThe.sever-alarms 25are' pivotally attached to the bolts 31, as illustrated;in'.Fig. .1 2,.- The several: bolts :31 are removed and" the arms32moved from thepositions shown Fig.1 to the positionsshown in Fig. 2 so1 that theinner two apertures of each one of;

The edge of the plate 20 opposite the the arms .32 register with theapertures in V theiadjacentarm 30,,Thej several arms 30 and..3 2.arethenconnected by the bolts 31;

a asillustrated, andtheinsert 39 put in place b'etweenthejfree ends ofthep'lates 20 and 21.

Theme-ea 39issomewhat wider than the insert 39 shown in Fig. 1 andserves to give lthe inside form the required shape to pro- ,uce apipehaving a substantlally. elliptical or oval shape.

ferent widths I amenabled to construct a or size within certain limitsIn order that the free ends ofthe sections 20 and121' of the Byproviding: number of'inserts of difconcrete pipe having practically anyshape 7 inneriorm may be' pulled inwardly upon movement of the severalarms 25 about their 1 partially flexible; 5

pivot pointsthe-sections 20 and 21 are made" Icla'im as new and desireto secure by Leta ters Patent of the United States is 1- :e-

1. 'In- E'pipe. form the combination of an inner; form consisting of twosubstantially sem1 clrcular'sectlons, means for connecting:

two of the longitudinal edgesof .said :sec-

Mons-together,- devices -attached to the 'secqf tions at points oppositethe e connection of said sections for moving the, freeflends, of; saidsections outwardly to expand the form; and a filler between: the freeends-of said sec-" tions.

2; Ina-pipeform the combinatioriof fan r inner form consisting of twosubstantially semi-clrcular sectlons; means for. connecting twoof thelongitudinal edges pf said *sectionsrtogether, devices attached; to 'the1 sec;

tions atzzpointsopposite; the connection of said-e'sectionsforcontracting the sectio'nsgto permit: removal of the innrijform; fromthe: pipe; and a filler between the free "ends: of I said section's;the-said fillerrbeiiig.vpivotally' securedtofoneof said sections: 7

l 3. ,In*a pipe'form'thecombination: of a" 7110 devices; provided 1 onthe inside ofythe' cylin der and connected-thereto on opposite sidessubstantially circular split 'fornr cylinder,

of'the slit forieirpanding, and contracting the form,;;-and a fillerarrangedv to, be. inserted 4 into the: 'slitbetween the free endsofpthej form. V I p a, i

,7 4:; .Ina pipe form the combination of an 'inside formrconsisting oftwov substantially semi-circular sectlons; means for; connecting,

saidsections together-along two of-th'ein lon- ,gitudin'al edges,-a-;.plura1ity ofrarms spaced "long tudinally, within the sections-andpivoted to the sections at points opposite thefree edges of .thesections: a bar pivotedlto the opposite-endsof said arms,- a pluralityof farmspivotal-1yw connected between the bar andthe free ends of saidsectionsyandza filler arranged -vto be inserted between the free ends Ofsai-d sectionsi v '5. In a pipe form the combination'of an said arms,and a plurality of adjustable arms pivotally connected between the barand the free ends of said sections.

6. An inside pipe form comprising a pair 1 of flexible semi-circularsections, means for connecting said sections together along two of theirlongitudinal edges, a filler pivoted to one of the sections along itslongitudinal edge opposite the said connection, devices carried by theother section for locking the filler in place between the longitudinaledges,

of the sections opposite the said connection,

Copies of this patent may be obtained for andmeans for moving inwardlyone of the ed es adjacent said filler.

. An inside pipe form comprising a pair of semi-circular'sections, meansfor connecting said sections together along two of their longitudinaledges, a filler pivoted to one of the sections along its longitudinaledge opposite the said connection, devices carried by the othersectionfor locking the filler in place between the longitudinaledges ofthe sections opposite the said connection, and

means for contracting the sections when the filler is swung inwardlyabout its pivot.

In witness whereof, I- hereunto subscribe my name this 21st day ofMarch, A. D. 1917.

HOWARD E. BURNS.

Witnesses I A. G, MOGALEB, ROBE T F. ,BRACKE.

five cents each, by addressing the Commissioner of latentl, Washington,D. 0." p f

